I've used coconut husk in the past for my snakes and still do for one of my corns. I have never encountered a problem with this substrate but I have switched all but one of my snakes to aspen bedding. I find aspen easier to spot the messes and clean them up but it is a personal opinion.
As long as you feed outside the enclosure I don't see a problem.
Keeper of 5 snakes, leopard geckos, 1 green iguana, 20+ tarantulas, 2 dogs & a bunch of rats!